Compressor



I. o. CAIIREY,

COMPRESSOR. APPLICATION FILED IuLY 28. I9I9.

'1,364,945l Patented Jan 192.1.

l nat-ir' earns* anatomica.

' JOHN o. Climent', or sn Louis, nissonni, vassieitoa To cement' ROTARY miente" COMPANY, or sr. Louis, Missionar, a coaronarroiior Missonar.

COMPRESSOR.

To llwhom f/t may concern:

Be it known that l, JOHN O. CARREY, a

citizen of the United States, residing at the city of St; Louis and State of `Missouri,

e haveinvented new and useful Compressors, of which the following is aspeciiication.,

This invention relates to improvements in compressors, and consists in the novel design, arrangement and combination of partsv pressed for delivery to a discharge passage. {Another lobject of the invention is to produce a compressor of the rotary type, adapted to compress 'air orother gas to a high pressure, with a minimum use of power.-

Another object o f the invention is to prot duce in a rotary compressor, a novel system for lubrication andl for sealing the coml pression chamber. o Additional objects andy advantages of the construction will appear from the following no detailed description thereof taken in connection with the accompanying drawing, in whichr- Figure 1 is a vertical section through the 1 compressor showing the construction thereof. Fig. 2 is a vertical the compressor. i

' l F ig. 3 is an inner face view of rone of the end plates of the. compressor case removed.

e Fig. 4 is a-fragmentary sectional view showing, in further detail, the construction of a hinged plate connection between the rotors. v Y v As illustrated, in the drawing, the compressor includes a base plate 1 having supporting standards 2 near each endthereof.

/ I cross section thro ugh cored cylindrical casting f3 is formed in` tegrallywith the standards 2 and is supportedthereby. The cored space between to .the walls of the casting 3 YAYforms a water Specification of Letters Patent.

16 and 17, constitutes an air-tight conne@ the head members 8, into which is connected rai-.entes aan. a, iaai.

Application led July 28, 1919. Serial No. 313,743.

jacket for cooling purposes, which is supplied with water through a hollow boss t in which a supply pipe 5 is connected.

llhe cooling fluid circulates through theJ water Jacket and is discharged through a hollow boss 6, into which is threaded a discharge passage 7.

End plates 8, are secured to both ends of the casting 3 by bolts 9. rfhe end plates are formed with axially alined hollow bosses 10, which constitute bearings for the shaft of the"interior rotor. The bearing members are eccentrically positioned with respect to the axis of the end plates. 4

The interior rotor 11 is inthe form of a hollow 4cylinder, having inlosing integral end members, from they center of which a supporting shaft 12, extends. The shaft 12 being journaled in thebearing members 10. 'An external rotor 13 ts over the rotor 111, and is in the form of an open ended cylfinder. The periphery of the rotor 13 is a ground surface which matches the ground surface of the interior casting`3, the casting 3 constituting a bearing for the rotor 13.

vThe rotors 11 and 13 are longitudinally connected by a hinged leaf 14, which has round knuckles 15 extending from opposite sides of the leaf, said knuckles fitting into corresponding channels 16 and 17 in the walls of the rotors 13 and 17, respectively.

The leaf/14, since the space between the. leaf and the respective rotors is maintained sealed by a lubricant thatenters channels tion dividing the space between the rotors into a non,- communicatingl compression chamber.

. The air inlet port 18 is formed in one of an air supply passage 19, having a. check valve 20 therein.

An outlet port 21 is formed in the opposite head-piece 8 and ispositioned so as to be at an advanced point on the circumfeh ence of the compression chamber.

A discharge passage 22,.having a check valve 23a therein communicates with the discharge port 21.

Since the rotors rotate on eccentric axes 10c with respect to each other, the space be tween them, or the compression chamber, is alternately enlarged and contracted. The inlet port is so positioned that a volume of air or other gas will be admitted to the compression chamber when it is enlarged to its greatest extent. 2lhe volume of air or other gas, thus admitted, is compressed as the ro-5 tation of the rotors continues, `and the space therein contracted, from the point of inlet to the point of discharge throughthe dispressed gas/ from the compression chambery,l

the compression chamber, as it begins to enlarge, receives a fresh charge of air or gas', thereby preventing back pressure or Lchoking of the compressing action of the compresser.

The lubrication and the sealing of the compression chamber is accomplished by an automatic' system of distribution of the pack ing` or lubricating fiuid. y

' hel discharge passage 23 carries the compressed air or gas from the compressor into a separator, comprising a case 24 in which is avertical battle wall 25 and staggered f' downwardly inclined baffle walls 26. 1

l' ference with the grooves ,31

rlhe lubricating or packing fluid isA induced in the system through a filler opening 27 in the 'case of the separator, from which it is conducted on thelow pressure side through a distributing conduit 28.

The oil or other lubricating fluid constitutes a seal for. the discharge opening for `the conduit 28, 'from the separator so that the compressedcvolume of' air or gas is forced out of the upper@ part of the sepa# rator case into a discharge conduit 29, in

which there is a check valve 30, from which it may be conducted to a storage tank or` other point.for use.

In the ends of the rotors 11 and 13 are grooves or channels 31 and 32 respectively,

33 and 34 formed which match with grooves the same circumin the end members 8 upon tively. f

The lubficating uid is supplied from the distributing conduit 28 to the Jgroo'ves in the rotors and in the end members. As these grooves are constantily l ing and lubrrcating u1d, anoil sea-l for the compresslon chamber Jomts is provided.

Acomplete cycle of rotation,

and 32, respecfV the combination with a cylindrical case, of

filledl with the packinserate Additionally, a sufficient quantity of the lui bricant will find its way into the space be-y tween the exterior of the rotor 13 yand the interior of the casting-3 to provide lubrication for the bearing between these two members.

`Likewise, the lubricant will be forced into the channels 16 and 17 in the rotors, con`- stituting a seal for the hinged plate connection with the rotors, and also serving to reduce the friction in ther hinged connection between the rotors.

The shafts l2 are provided" with a plurality of annular grooves 35, and by-pass 36, entering from the lubricant distributing conduit 28 provides means for lubricating the journals. The lubricant.is delivered near the inner ends of the shafts 12, and is worked outwardly to the ends of the bearin s. c 1

he ends of the bearings are threaded to rece1ve packing caps 37 in which a quantity of loose packing '38 is placed. The lubricant works'into the packed glands formed by the caps 37 and is returned into the circulating and lubricating system\ through the passa-ges' 39.

The rotors may be driven from any suitable source of power, eitherV by direct or indirect connection with the source of power.I

The 4indicated means' being a power pulley 40.

It will be understood from the foregoing that the expansion and contraction of the space between the rotors 11 and 13. develops a compression action whereby, upon each a volume of air is drawn into the compression chamber in its extended form a-nd`compressed therein, and

discharged from the compression chamber when/the chamber is contracted. The walls of the rotors approach ,and recede from each other by reason of the axes thereof, being arranged on eccentric points.

he lubricating and packing'system for the lubrication'of themechan1sm and for the packing of the compression chamber maybe clearly understood from the vspecific description above given. h

l am aware that thecon'struction may be modied'in certain particulars, without departure from the spirit and scope of the invention, I do not llmit myself, therefore, to the'exact construction shown and' described, but what I claim and desire to secure by Letters Patent, is

1. In an apparatus of the class described a cylindrical external rotor mounted in said case havmg an unobstructed inner surface, an Internal rotor withln` sald external rotor having an unobstructed. outer surface, a

shaft supporting said internal rotor eccentrically wlth respect to said external rotor 5 ranged to `rotate on anaxis eccentricto the insegue@ arranged to maintain a permanent line .of contact between said rotors at one side of the axis of said shaft, ,and a hinged plate pivoted to the walls of said rotorsrespectively constituting a partition betweenV the rotors.

2. ln an apparatus of the class described, the combination with anexternal rotor, of a cylindrical fcase wherein said external ro# tor is rotatably mounted, an internal rotor mounted within said first-named rotor, a shaftV supporting said' internal rotor so that the .axis thereof is eccentric with respect to the axis of rotation'V of said firstnamed rotor, and whereby 'a permanent' line 'of surface contact may be `vinaintainedbetween said rotors, a hinged plate having fixed pivot connection with the walls of said rotors respectively, constituting fa partition for the space between the rotors and being foldable within the segment of contact between the rotors, whereby said line of contact between the rotors is maintained, an inlet passage opening into the space between the rotors, and an exhaust passage communii 4eating with said space and arranged to register with the space on tlfe side of said plate opposite the inlet passage.

3; ln an a paratus of the class described, the combination with a cylindrical case hav'- ing a water jacket within the wall thereof, of a cylindrical rotor mounted in said case, said rotor having anunobstructed inner surface, an internal rotor having an unobstructed outer` surface mounted within said irstnamed rotor, revoluble supports forsaid internal rotor, said supports being araxis of rotation of said first-named rotor and lso positioned as to maintain a constant line of contact between the surfaces of said rotors, a plate having direct and fixedy pivot connection with the lwalls of said rotors, and liquid sealing devices between the ends of the rotors and the case.

4. ln an apparatus of the class described,

lthe combination with a cylindrical case, of `a cylindrical rdtor mounted in said case,

said rotor having a smooth unobstructed inner surface, an internal rotor having a smooth unobstructed surface mounted within said first-named rotor, journ al bearings in the, end walls. of said case 4positioned eccentrically with respectto the axis of the case, shafts journaied in saidbearing for supporting the internal rotor, said shafts having a series of annular grooves therein, means for introducing a liquid in. ,said groove to constitute a liquid seal, a hinge plate between thel rotors having apivot con'-.

nection with the walls of the rotor and being foldable withinthe line of' contact between the rotors, 'and means for admitting and discharging air into 4and from thespace between the rotors.

5. ln an apparatus yof the class described, ,i .the combination with afcylindrical rotor, of

a cylindrical f case wherein said rptor is mounted for rotation, an internal rotor withtioned at an advance-point onf the circurnference of the space between the rotors, a

discharge conduit leading from said outlet port, and a separator device into which said exhaust passage dischar es.

6; ln an apparatus o the class described,

the combination with a stationary cylindrical case having removable heads, a rotor in the form of aniopen-ended cylinder jour-V naled toY rotate in said case, shafts journaled in said case having an axis disposed eccentri cally with respect to the axis of said rotor, an internal rotor in the form of a closed cylinder fixed on said shafts, an i1i'v let valve mounted in said case and communicating with the space between the rotors, the case having a cut-out portion extending from one side of said inlet valve constituting a pressure release chamber, a

discharge valve positioned -in advance of the inlet valve and arranged to discharge the volume of gas from the space between the rotorsafter the volume has been compressed by the relative movement of the rotors, a plate'pivoted in the walls of said rotors respectively and extending longitudinally thereof, said plate being arranged to fold within the circumference of said external rotor, and means for revolving the shafts upon which said internal rotor is mounted.

7. Ain apparatus of the class described,

comprising an internal .and` an external rotor mounted in eccentric relation andarranged to maintain apermanent line of 'contact between the surfaces thereof, a plate pivotally connected with said rotors and being arranged to fold withinl the wall of one of said rotors, and meansvfor rotating said rotors whereby the space therebetween will begradually increased and diminished.

8. An apparatus ofthe class described, comprising an external andan internal rotor mounted for rotation in eccentric relation vand arrangeds to maintain a consta-nt line of contact between the surfaces thereof, a piston plate extending longitudinally with the axes of said rotors and being p ivoted within the walls of's'aid rotors respectively, and arizo liat

ranged to move in an arc inexcess of the lspace between the rotors, and means for revolving said rotors.

9. An apparatus of the class described,y

nally of the axis thereof,'an internal rotor mounted eocentrically with respect tosad internal rotor and positioned so that a conlo stant line ofscontaot is maintained between the surfaces of said rotors, a plate pivoted to `said rotors respectively and being arranged to fold within the recess-formed in said external rotor, and'means for rotating 511 said rotors.

f JOHN o. CARREY. 

